Melbourne Stars captain Shane Warne is facing another one-match ban - this time for a slow over rate.

Warne was suspended for one game last week after his heated confrontation with West Indies all-rounder Marlon Samuels.

But the spin legend is in hot water once again for an alleged breach of CA's spirit of the game law in regards to a slow over rate.

Warne, who was already on a strike for a slow over-rate violation, wasn't officially listed as captain for his team's semi-final loss to the Perth Scorchers on Wednesday night.

Paceman James Faulkner was given the captaincy duties for the match, but CA said it should be Warne who takes the blame for the slow over rate, claiming he had breached "Rule 5: Laws of Cricket and Spirit of the Game".

CA said they had sent a memo to BBL teams on December 5 stating: "If a team's official captain is selected but not named as captain, this will be considered against the Spirit of Cricket and may attract a Code of Behaviour charge."

The time and date of the hearing is yet to be determined.

However, it may not end up mattering for Warne, who may not play in the BBL again.

The Scorchers booked their place in Saturday's grand final against the Brisbane Heat with an eight-wicket victory against the Stars.

The Stars made 2-183 off 18 overs in the rain-affected contest, with the Scorchers chasing down the revised victory target of 139 off 13 overs in the final ball of their innings.

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